Read the following statements :
(A) There is no uncatalyzed metabolic conversion in living system.
(B) Isolated metabolic reactions in vitro are non-living things.
(C) There are thousands of metabolic reactions occurring simultaneously inside all living organisms.
Select the correct option :

detailed solution

Correct option is D

There is no uncatalysed metabolic conversion in living systems. Even CO2 dissolving in water, a physical process, is a catalysed reaction in living systems. The catalysts which hasten the rate of a given metabolic conversation are also proteins. These proteins with catalytic power are named enzymes.There are thousands of metabolic reactions occurring simultaneously inside all living organisms, be they unicellular or multicellular.Isolated metabolic reactions in vitro are not living things but surely living reactions.